Look in the SCCY box. You should have a small envelope with a spent 9MM casing from when the pistol was test fired. There should be a label on the outside showing the date that occured. The serial number on the CPX2 I got in July 2014 was 149XXX.

Another entry just below this on "General Discussion" site on [ Dec.28th relates to four CPX 1's ] with serial numbers beginning at 590XXX. Was your CPX2 "ORDERED" and came in later for pick up, or was it a "same day purchase" at the dealer? If it was in the store that same day you bought it then it may have been a return.